[ORC] Remove unused function declaration. (NFC)

llvm/include/llvm/ExecutionEngine/Orc/MachOPlatform.h

public:
 
     void notifyTransferringResources(ResourceKey DstKey,
                                      ResourceKey SrcKey) override {}
 
   private:
     using InitSymbolDepMap =
         DenseMap<MaterializationResponsibility *, JITLinkSymbolSet>;
 
-    void addEHAndTLVSupportPasses(MaterializationResponsibility &MR,
-                                  jitlink::PassConfiguration &Config);
-
     Error associateJITDylibHeaderSymbol(jitlink::LinkGraph &G,
                                         MaterializationResponsibility &MR);
 
     Error preserveInitSections(jitlink::LinkGraph &G,
                                MaterializationResponsibility &MR);
 
     Error processObjCImageInfo(jitlink::LinkGraph &G,
                                MaterializationResponsibility &MR);